The mother of Scarlett Keeling, the teenager killed while on holiday in Goa, said last night that she knows the identity of one of her daughter's killers.

Fiona MacKeown made the claim after returning to Britain from India, where she has spent the last nine days. "I was approached by many people who told me this man's name. It is common knowledge out there it seems. He is a powerful person with money. It would explain a lot - why police have tried to cover it up," she said.

"People are saying that they have had enough of him and his group and they want something done about it. I don't think he will get away with it once the CBI (India's central bureau of investigation) take over because they don't take instruction from anyone. Hopefully we will get to the truth."

Two men have been arrested in connection with Scarlett's death. Samson D'Souza was remanded in custody on suspicion of rape and Placido Carvalho has appeared in court on suspicion of drugging Scarlett and assisting in the murder.

MacKeown complained of a cover-up after police initially said the teenager had accidentally drowned when her partially naked body was found on Anjuna beach on February 18. An autopsy revealed Scarlett had been raped and murdered. It also showed that she had taken ecstasy, cocaine and LSD on the night she died.

MacKeown claims that the investigation into her daughter's death has been hampered by links between police, politicians and drug dealers. Authorities had used "tactics of intimidation" against her. "They have done everything they can to try to stop it being investigated properly."

The 15-year-old had been on a six-month holiday with her family. Her mother has been criticised by Indian officials for leaving her daughter in the care of a local tour guide while the rest of the family visited another part of the region.

MacKeown said she had been unable to recover organs which had been removed from Scarlett's body during a postmortem. Parts of Scarlett's uterus, kidneys, stomach and liver were discovered missing after a third postmorten was carried out in the UK. MacKeown had hoped to recover them for burial, but the Indian government said her request was "unprecedented" and could not be carried out.

MacKeown said local people had been very supportive of her campaign to find out what happened to her daughter. "It is quite moving the amount of people that have stopped and spoken to me. A lot of them feel very responsible that this has happened to Scarlett in their country."

She said she has not been contacted by a Bollywood film director who is reportedly planning to make a film based on the case. "If it is to show the corrupt officials in Goa then I think it could be a good idea. But I hear he is going to call it Rave Party, which doesn't sound good."